\set ECHO 0
  colnames  
------------
 {f1,f2,f3}
(1 row)

                colnames                
----------------------------------------
 {objoid,classoid,objsubid,description}
(1 row)

                colnames                
----------------------------------------
 {objoid,classoid,objsubid,description}
(1 row)

 colnames  
-----------
 {id,name}
(1 row)

       colnames       
----------------------
 {"The Id","My Name"}
(1 row)

 colnames 
----------
 {}
(1 row)